// Licensed to LinDB under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. LinDB licenses this file to you under
// the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

package mock

import (
	"fmt"
	"io"
)

type mockWriter struct {
	idx, err int
}

func NewWriter(err int) io.Writer {
	return &mockWriter{
		err: err,
	}
}

func (w *mockWriter) Write(data []byte) (int, error) {
	w.idx++
	if w.idx == w.err {
		return 0, fmt.Errorf("err")
	}
	return 0, nil
}
